<ul class="top_menu">
    <li<?php if(!isset($_GET['m']) OR $_GET['m']=='main'  OR $_GET['m']=='system' OR $_GET['m']=='subscribe'){ echo ' class="current"';} ?>><a href="?m=main" title="Home"><b>Home</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='history'){ echo ' class="current"';} ?>><a href="?m=history" title="History"><b>History</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='about'){ echo ' class="current"';} ?>><a href="?m=about" title="About UBPack"><b>About UBPack</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='product'){ echo ' class="current"';} ?>><a href="?m=product&s=technical-information" title="technical information"><b>Product</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='shape-size'){ echo ' class="current"';} ?>><a href="?m=shape-size" title="Shape & Size"><b>Shape & Size</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='patents-award'){ echo ' class="current"';} ?>><a href="?m=patents-award" title="Patents & Award"><b>Patents & Award</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='contact-us'){ echo ' class="current"';} ?>><a href="?m=contact-us" title="Contact Us"><b>Contact Us</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='news'){ echo ' class="current"';} ?>><a href="?m=news" title="News"><b>News</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='rss-news'){ echo ' class="current"';} ?>><a href="?m=rss-news" title="RSS News"><b>RSS News</b></a></li>
    <li<?php if(isset($_GET['m']) && $_GET['m']=='relate-article'){ echo ' class="current"';} ?>><a href="?m=relate-article" title="Relate Article"><b>Relate Article</b></a></li>
</ul>